摘要
苏里格气田东二区北部盒8段气藏出水层位多且分散,气田的合理、有效开发难度大。在对储层砂体和水体纵横向对比的基础上,分析了研究区盒8段水体赋存类型及分布特征,并明确了其主控因素。研究区盒8段水体可划分出河道砂体局部边(底)水、河道底部低凹处滞留透镜体水、致密砂岩封隔的透镜体水、孤立砂体形成的透镜体水和致密层残留水5种赋存类型。剖面上,纵向水层多为单个的薄层,横向为孤立的水体或被致密砂岩封隔的水层;平面上,水体分布相对分散,无区域性大面积连片分布的水体。综合分析表明:河道砂体的展布是水体分布的基础;水体分布不受区域构造的控制,在局部独立的气水系统中受局部构造控制,水在构造低部位聚集;储层非均质性使得水体在储层中往往是孤立的,呈透镜状,横向上互不连通。
Through the comparative analysis on reservoir sand bodies, transverse and longitudinal water, the He8 water in the north of East-2 of Sulige gasfield is divided into 5 water types which are locally edge (bottom) water of channel sand, ' lens ' water detained in the low-lying area of channel bottom, ' lens ' water sealed by tight sandstone, ' lens ' water formed by ' single ' sandstone body and residual water of dense layer. By the analysis of characteristics of water profile and plane, it is thought that, most of the water layers and water layers of water in longitudinal direction are single thin layers, while the isolated water is presented in the transverse direction, or the water layer sealed by dense layer; in plane, the water is distributed dispersedly comparatively, without the regional discontinuous water. According to comprehensive analysis, the main factors that controlled the water distribution are studied: the channel sand distribution of each layer is the base of formation water distribution; the regional tectonic has little effect on water distributions which are controlled by local sandstone micro-tectonic in partial isolated water system; and the reservoir heterogeneity leads to the fact that the water in reservoir is always isolated and non-communicating in transverse direction.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2013年第3期22-25,112,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"鄂尔多斯盆地碎屑岩层系大中型油气田富集规律与勘探方向"(2008ZX05044)
关键词
水体类型
边(底)水
透镜体水
残留水主控因素
苏里格气田东二区
water type
edge (bottom) water
lens water body
residual water
main controlling factors
East-2 of Sulige gasfield
